diff --git a/packages/client/scripts/default-index.d.ts b/packages/client/scripts/default-index.d.ts
index 0fa19bbef8c8..1104c7f71976 100644
--- a/packages/client/scripts/default-index.d.ts
+++ b/packages/client/scripts/default-index.d.ts
@@ -41,3 +41,7 @@ export declare type PromiseType<T extends PromiseLike<any>> = T extends PromiseL
  * Get the return type of a function which returns a Promise.
  */
 export declare type PromiseReturnType<T extends (...args: any) => Promise<any>> = PromiseType<ReturnType<T>>
+
+export namespace Prisma {
+  export type TransactionClient = any
+}